英文别名(S,E)-3-(2-((1R,3AS,7aR,E)-1-((2R,5R,E)-5,6-dimethylhept-3-en-2-yl)-7a-methyloctahydro-4H-inden-4-ylidene)ethylidene)-4-methylenecyclohexan-1-ol; 5,6-trans-Vitamin D2; 5,6-trans-Ergocalciferol; (3β,5E,7E,22E)-9,10-Secoergosta-5,7,10(19),22-tetraen-3-ol; Ergocalciferol EP Impurity A; Ergocalciferol (Vitamin D2) EP Impurity A (5,6-trans-Vitamin D2); 9,10-Secoergosta-5,7,10(19),22-tetraen-3-ol, (3β,5E,7E,22E)- (9CI); (S,E)-3-((E)-2-((1R,3aS,7aR)-1-((2R,5R,E)-5,6-dimethylhept-3-en-2-yl)-7a-methylhexahydro-1H-inden-4(2H)-ylidene)ethylidene)-4-methylenecyclohexanol 
